fix: scrub training public list detail privacy

src/services/training/training_case_service.py

@@ -31,11 +31,11 @@ class TrainingCaseService:
             instrument_id=instrument_id,
             limit=limit,
         )
-        return [_without_answer_key(case) for case in cases]
+        return [_sanitize_public_export(case) for case in cases]
 
     def get_case(self, case_id: int) -> Optional[dict]:
         case = self.repository.get_case(case_id, include_answer_key=False)
-        return _without_answer_key(case) if case else None
+        return _sanitize_public_export(case) if case else None
 
     def create_attempt(
         self,
@@ -99,12 +99,6 @@ class TrainingCaseService:
         return import_training_cases(payload, repository=self.repository)
 
 
-def _without_answer_key(row: dict) -> dict:
-    cleaned = dict(row)
-    cleaned.pop("answer_key", None)
-    return cleaned
-
-
 def _sanitize_public_export(value):
     if isinstance(value, dict):
         public_value = {}

tests/unit/test_training_public_export_privacy_m15.py

@@ -73,6 +73,9 @@ class _NestedPrivateRepository:
             }
         ][:limit]
 
+    def get_case(self, case_id: int, **kwargs):
+        return self.list_cases(limit=1)[0] | {"id": case_id}
+
 
 def _case_package_with_nested_private_material() -> dict:
     return {
@@ -168,6 +171,17 @@ class TrainingPublicExportPrivacyM15Tests(unittest.TestCase):
         self.assertEqual(item["metadata"]["metadata_note"]["public_label"], "visible")
         self.assertPublicPayloadHasNoPrivateMaterial(export_result)
 
+    def test_service_public_list_and_detail_scrub_nested_solution_material(self) -> None:
+        service = TrainingCaseService(repository=_NestedPrivateRepository())
+
+        list_result = service.list_cases(limit=100)
+        detail_result = service.get_case(151)
+
+        self.assertEqual(list_result[0]["meta"]["tasks"][0]["meta"]["public_hint"], "Focus on context.")
+        self.assertEqual(detail_result["meta"]["metadata_note"]["public_label"], "visible")
+        self.assertPublicPayloadHasNoPrivateMaterial({"items": list_result})
+        self.assertPublicPayloadHasNoPrivateMaterial(detail_result)
+
     def test_cli_smoke_public_export_scrubs_nested_solution_material(self) -> None:
         with tempfile.TemporaryDirectory() as tmpdir:
             package_path = Path(tmpdir) / "training_case_package.json"